| 简介 |
1. Method of the isolation of rare-earth elements from [shlifotkhodov] from the production of permanent magnets, which includes the dissolution of [shlifotkhodov] before sulfuric acid, the isolation of double salts Rare-earth elements- Na, the conversion of double salts in hydroxides rare-earth elements, dissolution of hydroxides rare-earth elements before the nitric acid, extraction separation on the line Nd- Sm, obtaining of the carbonates of average and heavy group rare-earth elements, extraction separation on the line Nd- Pr, the precipitation of oxalate of neodymium, obtaining of the extra-pure oxide of neodymium, neutralizing the ovary of the precipitation of double salt Rare-earth elements- Na with obtaining of the iron-cobalt of [keka].2. Method on [p].1, which is characterized by the fact that dual sulfates [RZ]- Na convert beside hydroxides rare-earth elements and then is dissolved before the nitric of [kislote].3. Method on [p].1, which is characterized by the fact that is not conducted the washing of dual sulfates [RZ]- Na and hydroxides [RZE].4. Method on [p].1, which is characterized by the fact that obtained hydroxides rare-earth elements are dissolved before the nitric acid and are sent at the point of extraction [razdelenie].5. Method on [p].1, which is characterized by the fact that processing the mother liquors of the precipitation of dual sulfates [RZ]- Na is accomplished by precipitation of iron-cobalt cake with the subsequent drying and by tempering of [ego].6. Method on [p].1, which is characterized by the fact that [shlifotkhody] during the dissolution do not pass [termoobrabotku].7. Method on [p].1, which is characterized by the fact that during the extraction separation of rare-earth elements first is conducted the division across the line Nd- Sm from the highly acid media, and then across the line Nd- Pr, moreover the neutralized raffinate of first stage is stock solution for the second stage of separation. |
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